Safe to driveDrivable, but watch it yourself
J1939 code SPN 1814. Below — how the fault is worded at the factory by Mercedes-Benz and SITRAK, and what the second half of the code (FMI) means in the standard.
| FMI 9 | J1939 VDC1 Message was not received or has stopped arriving |
| FMI 4 | Incorrect data length of the TSC1AE CAN frame. Effect: Torque may be limited. |
| SPN 1814 FMI 41814/4 · 1814.4 | voltage below normal or shorted to ground |
| SPN 1814 FMI 91814/9 · 1814.9 | abnormal update rate |
Safe to drive. Below — how much time you have and what happens if you keep going.
This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine.
You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.